Influence Of Opposition On Ball Velocity In The Handball Jump Throw

Table 1 Means (±SD) of anthropometrics in the three groups together with the effect size and observed power.

Level	n	Age (yr)	Height m)	Weight (kg)	Experience (yr)
Elite	36	26.9 (3.4)	1.90 (7.8)	90.3 (5.6)	18.7 (4.6)
Amateur	30	24.0 (2.2)	1.86 (7.2)	88.2 (6.9)	14.9 (2.9)
Under 18	53	17.2 (1.3)	1.81 (5.0)	82.9 (3.4)	8.8 (1.4)
p		<.001	<.001	<.001	<.001
η²		.783	.265	.292	.668
Statistical power		1.0	1.0	1.0	1.0

All differences among groups were significant at the p<0.05 level